| Acronym | Meaning |
 | SED | CERDEC Software Engineering Directorate |
| MMS | Multimission Modular Spacecraft |
| LLNL | Lawrence Livermore National Laboratory |
| BJT | Bipolar Junction Transistor |
| ZN | Zettanewton |
| IM | Isle Of Man (FIPS 10-4 Territory Code) -Instant Message (internet Speech) |
| LI | Limburgish Language (ISO 639-1 Code) |
| BC | Before Christ - Blind Copy (in Emailers) - Boston College -Botswana (FIPS 10-4 Country Code; From Bechuanaland) - British Columbia (postal Symbol) |
| TDRS | Tracking Data And Relay Satellite |
| VT | Vatican City-State (FIPS 10-4 Country Code) - Vermont (postal Symbol) -Video Tape |
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